/*
 * @ProjectName: 编程学习
 * @Copyright:   2019 HangZhou Yi Dev, Ltd. All Right Reserved.
 * @address:     https://yiyuery.github.io/
 * @date:        2019/5/20 20:57
 * @email:       xiazhaoyang@live.com
 * @description: 本内容仅限于编程技术学习使用，转发请注明出处.
 */
package com.example.template.pattern.singleton;

/**
 * <p>
 *  通过 synchronized 实现线程安全单例
 * </p>
 *
 * @author Yi
 * @version v1.0.0
 * @date 2019-08-18 21:40
 * @modificationHistory=========================逻辑或功能性重大变更记录
 * @modify By: {修改人} 2019-08-18
 * @modify reason: {方法名}:{原因}
 * ...
 */
public class ConcurrencySingleton {

    private static ConcurrencySingleton instance;

    private ConcurrencySingleton() {
    }

    public static synchronized ConcurrencySingleton getInstance() {
        if(instance == null){
            instance = new ConcurrencySingleton();
        }
        return instance;
    }

}
